Great, thanks!

If you don't mind, would you factor this out to something like the below, or see https://github.com/metricfu/metric_fu/blob/a1996fd/lib/metric_fu/logging/mf_debugger.rb#L26

Please also add a change entry to https://github.com/metricfu/roodi/blob/master/History.txt

```ruby
stream.reopen(null_stream_output)

private

def null_stream_output
   null_output_for_platform(RbConfig::CONFIG['host_os'])
end

def null_output_for_platform(host_os)
  case host_os
  when /mingw/mswin32/cygwin/o
    'NUL:'
  else
    '/dev/null'
  end
end
```